Your opponent will likely try and force you to trade with theirs before you have fun, though, so keep it in mind
On the other hand, while foil drop rates in normal Standard sets have increased recently, in the past, you'd open a foil mythic about one in every three boxes (and this might be being slightly generous), which means to open an original foil Theros printing of Heliod, God of the Sun, you'd have to open roughly 45 boxes of Theros, which means getting 50,000 copies would take 2,250,000 Theros booster boxes, which at $100 would add up to $225 million
You sometimes play it in Flash decks or other combos, but its rarely a good card in fair decks
Baylen, the Haymaker is a fantastic option for this, offering tons of value with minimal required support
Except for power and toughness, the tokens copy exactly what was printed on the original creature and nothing else (unless that creature was copying something else or it's a token